Motor brake control



Oct. 19, 1943. M. B. JACKSON 2,332,228

MOTOR BRAKE CONTROL 2 Sheets-Sheet 1 Filed March 10 1941 Inven 11m M. B. JACKSON MOTOR BRAKE CONTROL Filed March 10, 1941 Oct. 19, 1943.

2 Sheets-Sheet 2 Patented Oct. 19, 1943 UNITED .s AT S- PATEN YYQFFICE' 1 sustains Mara 1o, 1941, Serial Ne. 382,532 t 1 his-invention relates to control mechanism for brakes such as are used on motoricars, and" the object of the invention is toprovide a sim ple and inexpensive control mechanism that will f make the operation of motor cars, especially; at

companying drawingsin which: I

"Fi Us a View of the mechanism installed in a motor car in elevation and partial section,*the

point of view being in front'of and under the floor boards,- a .7 I, 1 is Fig. 2 a sectional 'view on the lin 2-2 in Fig.1,

1, partly broken-away to show the plunger 14,

Fig. 4a sectional view on the line 4-4in Fig; 5a view ofjthe floor boards of the motor car showing the arrangement of the foot pedals,

the point of View h me} behind and above'the floor boards, and v Fig. 6 a sectional View ohth ime; e -t n ing Parts in the different figures,

, V v s I a Fig. 3 a sectional viewon the line -3---3 in Fig.

The numeral indicates'a shaft; eing a s a;

in the construction Iof most motor cars, on which I a brake pedal is custo ari yihinged' and to which a clutch pedal'is customarily fastened. v 1 to the shaft 2 he clutch pedal rigidly fastened I and constrained to rock therewith.

'3 is a leve'r for operating shown).

4 is a shaft to which the lever 3 is rigidly at tached. v

hydraulic brakes (not v5 is a tie rod rockablypinned to the clutch pedal 2 at s and to the 1ever 3 at 1.

8 is a receptacle for containing for the operation ofgthe-hydraulic brakes, or v ;9 is a boss on the receptacleB 'and'n the shaft ,4 is rockably carried. 7 7

I0 is a lever rigidly attachedto the shaft 4.

atthe endremote fromthe lever 3. I I

vll are the floorboards of a..motor 'car (not:

shown).

1 12 1s a foot plate rigidly attached to: the pedal 2'. I3 is acylinder rigidly attached to the recep-ltacle 8. H IA is a. piston adapted to'be lever-11L ;.|s is as heid to thefloorboa'rdsll was;

w ich slidable m the. cylinder l3 and contacted by the free end of the bearing elip's t01'OCk.'. .v a

I! is a trigger rigidly-' attached to the shaft l5 and constrained to rock therewith. r r

is is a pawl rigidly attached to the shaft l5.' and constrained torock therewith. .w

I9 is a service brake pedal free to rock on the shaftll v I i 20' is'a spring attached to .the pedal l9 and tov the floorboards H whereby there is a'constant pull; tending to rotate the pedal I9 ina clockwise direction about the shaft I. i v s 2| is a lever for operating the hydraulic brakes. 221s a shaft towhichthe lever 2| is rigidly attached. .-i H 3 .7

23.is atie rod rockably pinned to the service brake-pedal H3 at Hand to the lever 2| at 25.

' 26 is a bossvon the receptacle 8 and in which, the shaft 22 is rockablycarried.

I'G, l6 in which the shaft I5 is free :21 is 'aileverattached to theshaft 22 at the,

plungers 33 and 34in their inoperative positions. 7

31 and 38 are triggers rigidly attached to the shaft 15 and constrained to rock therewithl I y -39 is a foot plate hinged to the floorboards; H at 40 and'adapted when pressed down by the foot of a driver to depress the plunger 34,

4| is a'projectionor guard formed on the plate 39." l u; The operationris as follows: a 1

Assuming the mechanism is positioned as shown I by the full lines in the drawings, it will be noted that the clutch pedal 2 extends upwardly through the floor boards asfar as it will go, and the s rvice brake pedal J9 is down through the floor boards until the notch 28 is positioned for en gagement by the pawl l8. The spring 28.1 thus held from applyingthe brake. I

This. is the: normal driving position of 1 the mechanism .andin'this position there will be no pressure in the braking system since there will be no forceontheipiston M. to move it to the right in the cylinder l3.

The driver normally sits Withhis feet positioned I are bearing fastened" to the floor} he sits with his right foot on a hinged foot plate 29 and his left foot resting at east just to the left of the clutch pedal [2. These positions are shown in full lines in Fig. 5, the left foot being preferably over the plunger 33.

When the driver with his feet in these positions desires to slow down gradually, he presses with his left foot on the plunger 33 to depress it and cause the trigger 3'! to rotate clockwise. The shaft [.5- and. the pawl l8 are. thus; tu ed until the engaging end of. the pawl is withdrawn from the notch 28. The service brake pedal 19 will now be actuated by the spring 20 to apply resting on the foot plate 29, the upward movement of the brake pedal [9 by thespringlll is'conr.

It should be noted that the motion of the drivers right foot to the left is limited by the guard 4|, which while shown integral with the foot plate 39 is not necessarily so, and that the position of the guard is such that when it is contacted by the drivers foot the said foot overlies the foot plate 39 and also part of the hinged plate 29. Thus, the lever l9 when the pawl I8 is disengaged therefrom moves upwardly to apply the brake, the, hinged plate 29 will contact the portion of the drivers foot overlying said plate 29 so that the intensity of the brake application may be varied. the brakes. Since the right foot of the drive is I mke pedal; means, tending to move the pedal to trolled by the driver so that the brakes may be applied as gently as desired.

suddenly the right foot will be entirely removed from the pedal I3 and the parts: of themechanism. will quickly move to the brake applying positions shown by the dotted, lines in Fig. 4,.

The depressing of. the. left. toe: and: the simultaneous lifting of the right: foot: are. convenient and normal where transition f'rom continuous direct driving to slowing down is; requiredzfi and the positions of the drivers feet thus far. described are those positions convenient and normal to such continuous direct driving; Thereiarethowever other cases in which the drivers. feet. are not so positioned, the left footbeingnecessarily on the clutch pedal instead. of ati'est beside it. One such case is thatof coasting with. the clutch out, another gear changing and manoeuvring inv trafiic. These cases demand: different braking motions from that already described, as itwould not.

only be a matter of difllculty but of danger for a driver driving with his clutch held outta. be

system of brake control the driver may do either of two things, both entailing actions exactly in line with those motions he would have to makeif he were driving a car equipped with the push brake.

system. The first of these said motions necessary to stop a car equipped with a push brake system" is the raising the right foot from the hingedlpodal (accelerator pedal) on which it i resting, moving the foot to the left and pressing down on the brake pedal which such movement to the left brings underhis foot; and the second the push ing down of the left foot on the clutch pedal to prevent stalling the engine. a I 3 These same motions, or either of them; made by a driverof a car equipped with m'ysystem of brake control will cause braking. For example the pushing down of the left foot on the-clutch pedal 2 will cause the projection or camkilthereon (see Fig. 3) to contact the trigger :i'l rocking it, the shaft l5, and the pawll 8, clockwiseto free the brake pedal l9 and allow it to ri e under' the restraint'of the driver's foot, when as hereinbefore explained braking will be attained-in proportion to the removal of the restraint. 1

This is the normal way of applyingmy-brakes when the left foot is not available to-depressthe ing it to the left, and pressing on the foot plate function as the cam 30.

In either case the brake pedal l9 will rise under the driver's foot giving him perfect flexible brake.

control.

What I claim is: 1 A brake controlling mechanism comprising a apply the brake; a "pawl for releasably engaging 3 the pedal to hold it in its brake releasing posi- If it be desired to bring the car to a full stop tion.'. al clutch pedal'having a projection; a trigger connected with the pawl for engagement by the projection. upqnmov mentof the lutchp dal cause the. pawl to release thebrake. pedal so-that the. first menti ned. means. is n rmi ted to app y: the, brake; and.-a...plate on. the. brake pedal. 3. 3. mally engaged by the. foot of an; onera prsp that.

.the movement of the brake pfllakhyliheibi flkq anplyinameans. is controlled by theoneratnn -2s. A. brake. ontrollin mechanismcpmn i ins: a. brake pedal; means tending to; move-the pedal. to appl'y'the. brake; mea s f r rel as b rh l m the. pedal. in its. brake. releasing-- nositi a;.. ;clutah;; peda1;;.a footengagin p ate; mea sope ablesbw: one of said clutch pedal and said foot plate for a tuatin the ld'in 1fi. i!s.tO.- pe m t th first mentioned means to apply the brake; anda Plate on the -,b1.%k;. edal n rmally l fi fi by the. foot of an. oper tor. the aid p ates. be ng ma tioned side by side. o. t at eeerato s q tmay engage the first mentioned plate while still overr -ng the sec nd mention d-p a e whereby h mo ement. of t e Plalsepedalbythe b ake anp ine-m a s controlle by the Qperator.

3. A brake controlling mechanism comprising. a, bra e pedal; means t ndi to more the pedal to apply the brake; a rotatable shaft; a pawl Sen.

ured. to said Shaft for engaginsthe. brak P to releasably hold it. inits brake. rel ii l IpQ i: tion; manual y ope a le man er, itulifnii a h shaft to disengage the pawi'ir m. tbe b ak ped l. t p rm t the first'me itioned me s app y h brake; d a plataqcarried by andjmovablej re w tive to the brakefpedal Without moving saidibraire pp i m n ...;said pawl and said means-for disengagin the pawl. the platebeing normally engaged by the foot of an operator so that the movement of the brake pedal by the brake-applying means is controlled-by the operator. i

4. A brake controlling mechanism comprising a brake pedal; means tendilngto mov the pedal to apply the brake; a rotat-able shaft;- a pawl" secured-to said shaft for-engaging the-brake pedal to. releasably hold itin its brake releasing posi-' tion; a trigger secured to said shaft; a clutch pedal having provisions-foren'gaging said trigger to cause theshaftto be -turned';and' thus the pawl to be disengaged from thebrak'e pedalwhenthe clutch pedal is depressed; andta plate, carried by and movable relative to the brake pedal, nor-l mallyengaged bythe foot otan operator so that the movement of the brake pedalrby the brake applying means is controlled by the operator.

5.: A brake controlling mechanismcomprising a brake pedah-means tending. tomove: the pedal to. apply the brake; a rotatable shaft; a pawl secured to said shaft for engaging the brake. pedal to releasably hold it in its brake releasing position; a plurality of triggers secured to said shaft in spaced relationship to one another; a clutch pedal having provisions for engaging one of said triggers to cause the pawl to be disengaged from the brake pedal when the clutch pedal is depressed; manually operable members for engaging said other triggers to cause the shaft to be turned and the 

